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APM Maksutov Cassegrain 275 mm f/14 Telescope; APM has 1 pc Telescopes Maksutov Cassegrain 275 mm f/14 with small C.O., very light weight and fast cool down time, Optics from INTES MICRO, mechanics from Matthias Wirth , for sale the optical design was ordered and made by the famous Astrooptik Dipl. Ing. Physics Philipp Keller . The high quality quarz material for the mirrors is from USA, polished by INTES MICRO in Russia. Our requirements for the optics has been to be better than 1/8 wavefront p.t.v. for the complete system proofed by Zygo Testreport Telescope parameters: Coatings for Meniscuslens : broadband multicoating optical diameter in use of meniscuslens 275 mm optical diameter in use of primary mirror 295 mm photo-visuel central obstruction include baffle : 25 % of diameter ( for imagers near straylight places we supply a second baffle with 33 % C.O. which can be fittet in a minute ) Back focus can be settet by quick focus at secondary mirror from 60 yards to infinity for any accessorie ( very wide range possible ) Focuser: 2" Starlight Feather Touch Focuser image circle at focus : 45 mm diameter meniscuslens comes with dew shield mirror cooling fans comes with 9~12 Volt connection primary mirror has 3 sets of push pull screws for collimation meniscuslens has 6 volt heater tube diameter 360 mm; tubelength 700 mm; flexible dew shield; secondary mirror has 3 spring loadet screws for collimation weight complete optical tube with focuser, dovetail, handle, dew shield 21 kg = ~ 46 lbs we have in total 1 new Telescope left, which has white tube color
Item condition: new, but not original packed